#include "workerManager.h"
WorkerManager::WorkerManager()
{
    ifstream ifs;
    ifs.open(FILENAME,ios::in);

    //文件不存在情况
    if(!ifs.is_open())
    {
        //cout << "文件不存在" << endl;    //测试输出
        this->m_EmpNum = 0;             //初始化人数
        this->m_FileIsEmpty = true;     //初始化文件为空标志
        this->m_EmpArray = NULL;        //初始化数组
        ifs.close();                    //关闭文件
        return;
    }

    //文件存在，并且没有记录
    char ch;
    ifs >> ch;

    if(ifs.eof())
    {
        //文件为空
        //cout << "文件为空！" << endl;
        //初始化记录人数
        this->m_EmpNum = 0;
        //初始化数组指针
        this->m_FileIsEmpty = true;
        //初始化文件是否为空
        this->m_EmpArray = NULL;
        ifs.close();
        return;
    }

    //文件存在，并且记录数据
    int num = this->get_EmpNum();
    //cout << "职工个数为：" << num << endl;  //测试代码
    this->m_EmpNum = num;                  //更新成员属性

    //根据职工数创建数组
    this->m_EmpArray = new Worker *[this->m_EmpNum];
    this->m_FileIsEmpty = false;

    //初始化职工
    init_Emp();

    //测试代码
    // for(int i = 0;i < m_EmpNum;i++)
    // {
    //     cout << "职工号：" << this->m_EmpArray[i]->m_Id
    //          << " 职工姓名：" << this->m_EmpArray[i]->m_Name
    //          << " 部门编号：" << this->m_EmpArray[i]->m_DeptId
    //          << endl;
    // }
}
void WorkerManager::Show_Menu(){
	cout << "********************************************" << endl;
	cout << "*********  欢迎使用职工管理系统！ **********" << endl;
	cout << "*************  0.退出管理程序  *************" << endl;
	cout << "*************  1.增加职工信息  *************" << endl;
	cout << "*************  2.显示职工信息  *************" << endl;
	cout << "*************  3.删除离职职工  *************" << endl;
	cout << "*************  4.修改职工信息  *************" << endl;
	cout << "*************  5.查找职工信息  *************" << endl;
	cout << "*************  6.按照编号排序  *************" << endl;
	cout << "*************  7.清空所有文档  *************" << endl;
	cout << "********************************************" << endl;
	cout << endl;
}
//增加职工
void WorkerManager::Add_Emp()
{
    cout << "请输入增加职工数量："<<endl;
    
    int addNum = 0; //保存用户的输入数量
    cin >> addNum;

    if(addNum > 0)
    {
        //计算新空间大小 -- 新空间人数 = 原来记录人数 + 新增人数
        int newSize = this->m_EmpNum + addNum;

        //开辟新空间
        Worker** newSpace = new Worker*[newSize];

        //将原来空间下数据，拷贝到新空间下
        if(this->m_EmpArray != NULL)
        {
            for(int i = 0;i < this->m_EmpNum;i++)
            {
                newSpace[i] = this->m_EmpArray[i];
            }
        }

        //批量添加新数据
        for(int i = 0;i < addNum;i++)
        {
            int id;         //职工编号
            string name;    //职工姓名
            int dSelect;    //部门选择

            cout << "请输入第 " << i + 1 << " 个新职工编号:" << endl;
            cin >> id;

            cout << "请输入第 " << i + 1 << " 个新职工姓名:" << endl;
            cin >> name;

            cout << "请选择该职工岗位：" << endl;
            cout << "1、普通职工" << endl
                 << "2、经理" << endl
                 << "3、老板" << endl;
            cin >> dSelect;

            Worker *worker = NULL;
            switch(dSelect)
            {
            case 1:
                worker = new Employee(id,name,1);
                break;
            case 2:
                worker = new Manager(id,name,2);
                break;
            case 3:
                worker = new Boss(id,name,3);
                break;
            default:
                break;
            }
            //将创建职工指针，保存到数组中
            newSpace[this->m_EmpNum + i] = worker;
        }

        //释放原有空间
        delete[] this->m_EmpArray;

        //更改新空间的指向
        this->m_EmpArray = newSpace;

        //更新职工不为空
        this->m_FileIsEmpty = false;

        //更新新的职工人数
        this->m_EmpNum = newSize;

        //提示添加成功
        cout << "成功添加" << addNum << "名新职工！" << endl;

        this->save();   //保存数据到文件中
    }
    else
    {
        cout << "输入数据有误" << endl;
    }

    //按任意键清屏回到上级目录
    system("pause");
    system("cls");
}
void WorkerManager::ExitSystem()
{
    cout << "欢迎下次使用" <<endl;
    system("pause");
    exit(0);                //在函数之外退出程序
}

void WorkerManager::save()
{
    ofstream ofs;                   //创建流对象(文件输出流)
    ofs.open(FILENAME,ios::out);    //打开文件:ofs.open("文件路径",打开方式)
    //out：用文件而打开文件 -- 写文件
    //app：追加方式写文件

    for(int i = 0;i < this->m_EmpNum;i++)
    {
        ofs << this->m_EmpArray[i]->m_Id << " "
            << this->m_EmpArray[i]->m_Name << " "
            << this->m_EmpArray[i]->m_DeptId << endl;
        //写数据:ofs << "写入的数据"
    }

    ofs.close();    //关闭文件
}
//统计人数
int WorkerManager::get_EmpNum()
{
    ifstream ifs;
    ifs.open(FILENAME,ios::in);

    int id;
    string name;
    int dId;

    int num = 0;

    while(ifs >> id && ifs >> name && ifs >> dId)
    {
        //记录人数
        num++;
    }
    ifs.close();

    return num;
}
//初始化员工
void WorkerManager::init_Emp()
{
    ifstream ifs;
    ifs.open(FILENAME,ios::in);

    int id;
    string name;
    int dId;
    
    int index = 0;
    while(ifs >> id && ifs >> name && ifs >> dId)
    {
        Worker *worker = NULL;

        //根据不同的部门Id建立不同对象
        if(dId == 1)    //1普通员工
        {
            worker = new Employee(id,name,dId);
        }
        else if(dId == 2)   //2经理
        {
            worker = new Manager(id,name,dId);
        }
        else            //总裁
        {
            worker = new Boss(id,name,dId);
        }
        //存放在数组中
        this->m_EmpArray[index] = worker;
        index++;
    }

    //关闭文件
    ifs.close();
}
//显示职工
void WorkerManager::Show_Emp()
{
    if(this->m_FileIsEmpty)
    {
        cout << "文件不存在或记录为空！" << endl;
    }
    else
    {
        for(int i = 0;i < m_EmpNum;i++)
        {
            //利用多态调用接口
            this->m_EmpArray[i]->showInfo();
        }
    }

    system("pause");
    system("cls");
}
//按照职工编号判断职工是否存在，若存在返回职工在数组中位置，不存在返回-1
int WorkerManager::IsExist(int id)
{
    int index = -1;
    for(int i = 0;i < this->m_EmpNum;i++)
    {
        if(this->m_EmpArray[i]->m_Id == id)
        {
            index = i;
            break;
        }
    }
    return index;
}
//删除职工
void WorkerManager::Del_Emp()
{
    if(this->m_FileIsEmpty)
    {
        cout << "文件不存在或记录为空！" << endl;
    }
    else
    {
        //按职工编号删除
        cout << "请输入想要删除的职工号：" << endl;
        int id = 0;
        cin >> id;

        int index = this->IsExist(id);

        if(index != -1)     //说明index上位置数据需要删除
        {
            for(int i = index;i < this->m_EmpNum - 1;i++)
            {
                this->m_EmpArray[i] = this->m_EmpArray[i+1];
            }
            this->m_EmpNum--;

            this->save();   //删除后数据同步到文件中
            cout << "删除成功！" << endl;
        }
        else
        {
            cout << "删除失败，未找到该职工" << endl;
        }
    }

    system("pause");
    system("cls");
}
//修改职工
void WorkerManager::Mod_Emp()
{
    if(this->m_FileIsEmpty)
    {
        cout << "文件不存在或记录为空！" << endl;
    }
    else
    {
        cout << "请输入修改职工的编号：" << endl;
        int id;
        cin >> id;

        int ret = this->IsExist(id);
        if(ret != -1)
        {
            //查找到编号的职工
            delete this->m_EmpArray[ret];

            int newId = 0;
            string newName = "";
            int dSelect = 0;

            cout << "查到：" << id << "号职工，请输入新的职工号：" << endl;
            cin >> newId;

            cout << "请输入新姓名：" << endl;
            cin >> newName;

            cout << "请输入岗位：" << endl;
            cout << "1、普通职工" << endl;
            cout << "2、经理" << endl;
            cout << "3、老板" << endl;
            cin >> dSelect;

            Worker* worker = NULL;
            switch (dSelect)
            {
            case 1:
                worker = new Employee(newId,newName,dSelect);
                break;
            case 2:
                worker = new Manager(newId,newName,dSelect);
                break;
            case 3:
                worker = new Boss(newId,newName,dSelect);
                break;
            default:
                break;
            }

            //更改数据到数组中
            this->m_EmpArray[ret] = worker;

            cout << "修改成功！" << endl;

            //保存到文件中
            this->save();
        }
        else
        {
            cout << "修改失败，查无此人" << endl;
        }
    }

    //按任意键清屏
    system("pause");
    system("cls");
}
//查找职工
void WorkerManager::Find_Emp()
{
    if(this->m_FileIsEmpty)
    {
        cout << "文件不存在或记录为空！" << endl;
    }
    else
    {
        cout << "请输入查找的方式：" << endl;
        cout << "1、按职工编号查找" << endl;
        cout << "2、按姓名查找" << endl;

        int select = 0;
        cin >> select;

        if(select == 1)     //按职工号查找
        {
            int id;
            cout << "请输入查找的职工编号" << endl;
            cin >> id;

            int ret = IsExist(id);
            if(ret != -1)
            {
                cout << "查找成功！该职工信息如下：" << endl;
                this->m_EmpArray[ret]->showInfo();
            }
            else
            {
                cout << "查找失败，查无此人" << endl;
            }
        }
        else if(select == 2)        //按姓名查找
        {
            string name;
            cout << "请输入查找的姓名：" << endl;
            cin >> name;

            bool flag = false;      //查找到的标志
            for(int i = 0;i < m_EmpNum;i++)
            {
                if(m_EmpArray[i]->m_Name == name)
                {
                    cout << "查找成功，职工编号为："
                         << m_EmpArray[i]->m_Id
                         <<" 号的信息如下：" << endl;
                    flag = true;
                    this->m_EmpArray[i]->showInfo();
                }
            }
            if(flag == false)
            {
                //查无此人
                cout << "查找失败，查无此人" << endl;
            }
        }
        else
        {
            cout << "输入选项有误" <<endl;
        }
    }
    system("pause");
    system("cls");
}
//排序职工
void WorkerManager::Sort_Emp()
{
    if(this->m_FileIsEmpty)
    {
        cout << "文件不存在或记录为空" << endl;
        system("pause");
        system("cls");
    }
    else
    {
        cout << "请选择排序方式：" << endl;
        cout << "1、按职工号进行升序" << endl;
        cout << "2、按职工号进行降序" << endl;

        int select = 0;
        cin >> select;

        for(int i = 0;i < m_EmpNum;i++)
        {
            int minOrMax = i;
            for(int j = i+1;j < m_EmpNum;j++)
            {
                if(select == 1)     //升序
                {
                    if(m_EmpArray[minOrMax]->m_Id > m_EmpArray[j]->m_Id)
                    {
                        minOrMax = j;
                    }
                }
                else if(select == 2)
                {
                    if(m_EmpArray[minOrMax]->m_Id < m_EmpArray[j]->m_Id)
                    {
                        minOrMax = j;
                    }
                }
            }
            if(i != minOrMax)
            {
                Worker* temp = m_EmpArray[i];
                m_EmpArray[i] = m_EmpArray[minOrMax];
                m_EmpArray[minOrMax] = temp;
            }
        }
        cout << "排序成功，排序后结果为：" << endl;
        this->save();
        this->Show_Emp();
    }
}
//清空函数
void WorkerManager::Clean_File()
{
    cout << "确认清空？" << endl;
    cout << "1、确认" << endl;
    cout << "2、返回" << endl;

    int select = 0;
    cin >> select;

    if(select == 1)
    {
        //打开模式 ios::trunc 如果存在删除文件并重新创建
        ofstream ofs(FILENAME,ios::trunc);
        ofs.close();

        if(this->m_EmpArray != NULL)
        {
            for(int i = 0;i < this->m_EmpNum;i++)
            {
                if(this->m_EmpArray[i] != NULL)
                {
                    delete this->m_EmpArray[i];
                }
            }
            this->m_EmpNum = 0;
            delete[] this->m_EmpArray;
            this->m_EmpArray = NULL;
            this->m_FileIsEmpty = true;
        }
        cout << "清空成功！" << endl;
    }
    system("pause");
    system("cls");
}
WorkerManager::~WorkerManager()
{
    if(this->m_EmpArray != NULL)
    {
        delete[] this->m_EmpArray;
        this->m_EmpArray = NULL;
    }
}